Results 41 to 50 of about 3,239,912 (305)

Dual‐Mode Ion‐Pair Charge‐Transfer Organic Nanoparticles From Fluorescent Viologens for Amine Sensing and Encrypted Data Storage

open access: yesAggregate
To overcome the intrinsic drawbacks of conventional viologens, such as slow optical response and poor radical stability, we synthesized a series of viologen derivatives (BTV, NTV, and STV) by incorporating thiazolo[5,4‐d]thiazole units into bipyridine ...
Jiayao Sha   +8 more
doaj   +1 more source

Quick Introduction into the General Framework of Portfolio Theory

open access: yesRisks
This survey offers a succinct overview of the General Framework of Portfolio Theory (GFPT), consolidating Markowitz portfolio theory, the growth optimal portfolio theory, and the theory of risk measures.
Philipp Kreins   +2 more
doaj   +1 more source

Graph Search-Based Exploration Method Using a Frontier-Graph Structure for Mobile Robots

open access: yesSensors, 2020
This paper describes a graph search-based exploration method. Segmented frontier nodes and their relative transformations constitute a frontier-graph structure.
Hyejeong Ryu
doaj   +1 more source

A new methodology for deriving the efficient frontier of stocks portfolios: An advanced risk-return model [PDF]

open access: yesJournal of Artificial Intelligence and Data Mining, 2014
In this paper after a general literature review on the concept of Efficient Frontier (EF), an important inadequacy of the Variance based models for deriving EFs and the high necessity for applying another risk measure is exemplified.
Sh. Mehrjoo, M. Jasemi, A. Mahmoudi
doaj   +1 more source

Modely analýzy obalu dat s fixním součtem výstupů

open access: yesTrendy v podnikání, 2022
Traditional data envelopment analysis (DEA) models do not consider any relations with respect to the sum of values of outputs. In many real applications, the sum of outputs is predetermined and cannot be changed.
Josef Jablonský
doaj   +1 more source

Genetic dissection of human ABCE1 in yeast reveals separable requirements for ribosome recycling and suppression of aberrant reinitiation

open access: yesFEBS Open Bio, EarlyView.
Human ABCE1 cannot functionally replace its yeast ortholog. Yeast–human chimera analysis identified NBD1 as a major interspecies barrier. Genetic screening yielded hABCE1 revertants that rescue yeast viability but fail to suppress aberrant translation reinitiation in the 3′ UTR.
Eriko Nakata   +3 more
wiley   +1 more source

A Meta-heuristic Algorithm for Portfolio Selection Problem under Cardinality and Bounding Constraints [PDF]

open access: yesپژوهشهای اقتصادی, 2008
The focus of this paper is on standard Markowitz mean–variance model and its traditional approach to solve portfolio selection problem (Quadratic Planning).
mohammad taghi Taqavi Fard   +2 more
doaj  

Closed-Form Covariance Matrix for Portfolio Optimization: Theory and Empirical Evidence Under a Multidimensional Black–Scholes Model with Time-Varying Parameters

open access: yesMathematics
This paper develops a model-driven analytical framework for portfolio optimization under a multidimensional Black–Scholes model with time-varying parameters, where both the drift and volatility functions evolve linearly over time.
Touch Toem   +2 more
doaj   +1 more source

Portfolio optimization with simulated annealing algorithm [PDF]

open access: yesتحقیقات مالی, 2015
The Markowitz issue of optimization can’t be solved by precise mathematical methods such as second order schematization, when real world condition and limitations are considered.
Saeid Qodsi, Reza Tehrani, Mahdi Bashiri
doaj   +1 more source

Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level

open access: yesAging and Cancer, EarlyView.
This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley   +1 more source

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